audioOS 9.9.17.1 (build 21K69) is an official Apple over-the-air update for the HomePod mini, released on 2023-10-25T17:23:56Z. The update package is 1.53 GB. This is a delta (partial) update that requires 15.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: bbc22c7480c753ebbecf50e6ce74c6f064ee01c2.zip.